Magnesium Chemicals: Mag-Sulph, Mag-Carb Using Waste Magnesite Dust

Introduction

Magnesite dust containing 40-50% MgO (60-80 mesh) is treated with sulphuric acid under controlled conditions and is followed by crystallisation. After solid-liquid separation, mag-sulph crystals are produces which can be utilised for producing magnesium carbonate with sodium sulphate as a byproduct.

Major raw materials

Magnesite dust, Sulphuric acid, water, steam etc.

Major Plant Equipment/Machinery

Constant stirred tank reactor, crystallizer, centrifuge, filter press, a small boiler

Applications

Magsulph can be used for manufacturing high quality magnesite bricks, fire proofing, micronutrients for tea gardens, pharmaceuticals etc. and as a starting material for other Mag-chemicals.

Status of Development

Lab scale

Technology Transfer Assistance Offered

Includes (a) Process know-how (b) Details of the equipment (c) Plant lay-out (d) Quality assurance methods. Assistance in setting up the plant and separate terms

Additional Information

A plant with a capacity of 1500 tpa magsulph and 900 tpa mag-carbonate at 100% capacity utilisation will have 60% return on investment.

For further information please contact :

Director
National Metallurgical Laboratory
Jamshedpur-831 007, India
Tel: (0)657-2271715, 2270092
Fax:(0)657-2270527
Email: director@nmlindia.org